Q: Is a laser a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation? ¶
Q: Are lasers diodes which are electrically pumped? ¶
Q: Are lasers usually up to 5 mW and involve a small risk of eye damage within the time of the blink reflex? ¶
Q: Are lasers in this class? ¶
Q: Are lasers gas lasers that generate deep ultraviolet wavelengths? ¶
Q: Is a laser capable of emitting extremely short pulses on the order of tens of picoseconds down to less than 10 femtoseconds? ¶
Q: Are lasers powered by a chemical reaction permitting a large amount of energy to be released quickly? ¶
Q: Are lasers a most versatile tool for researching processes occurring on extremely short time scales , for maximizing the effect of nonlinearity in optical materials? ¶
A: Yes, Due to the large peak power and the ability to generate phase-stabilized trains of ultrafast laser pulses, mode-locking ultrafast lasers underpin precision metrology and spectroscopy applications.
Q: Is a laser known as continuous wave? ¶
A: Yes, Many types of lasers can be made to operate in continuous wave mode to satisfy such an application.
Q: Is a laser an inexpensive gas laser? ¶
A: Yes, and often home-built by hobbyists, which produces rather incoherent UV light at 337.
Q: Is a laser unusually high: over 30%? ¶
A: Yes, Argon-ion lasers can operate at a number of lasing transitions between 351 and 528.
Q: Is a laser operating it is said to be "lasing"? ¶
Q: Are lasers also commonly frequency doubled? ¶
A: Yes, and tripled or quadrupled to produce 532 nm , 355 nm and 266 nm beams, respectively.
Q: Are lasers still termed "continuous wave" as their output power is steady when averaged over any longer time periods? ¶
A: Yes, and with the very high frequency power variations having little or no impact in the intended application.
Q: Is a laser yet to be realized? ¶
Q: Are lasers especially of interest to the military? ¶
A: Yes, and however continuous wave chemical lasers at very high power levels, fed by streams of gasses, have been developed and have some industrial applications.
Q: Are lasers mainly known in their liquid form? ¶
A: Yes, and researchers have also demonstrated narrow-linewidth tunable emission in dispersive oscillator configurations incorporating solid-state dye gain media.
Q: Are lasers semiconductor lasers that have an active transition between energy sub-bands of an electron in a structure containing several quantum wells? ¶
Q: Was a laser called an optical maser? ¶
A: Yes, this term is now obsolete.
Q: Was a laser a ruby laser, made from ruby? ¶
A: Yes, The population inversion is actually maintained in the dopant.
Q: Are lasers lasers based on nano-structures that provide the mode confinement and the density of optical states structure required for the feedback to take place? ¶
Q: Are lasers regularly used in industry for cutting and welding? ¶
Q: Was a laser built in 1960 by Theodore H? ¶
A: Yes, Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow.
Q: Were lasers sold with a value of US$2.19 billion? ¶
Q: Is a laser capable of being mounted in an aircraft? ¶
A: Yes, and ship, or other vehicle because it requires much less space for its supporting equipment than a chemical laser.
Q: Are lasers a special sort of gas laser powered by an electric discharge in which the lasing medium is an excimer? ¶
A: Yes, or more precisely an exciplex in existing designs.
Q: Are lasers used to make bright green laser pointers? ¶
Q: Are lasers characterized according to their wavelength in a vacuum? ¶
Q: Is a laser important in the field of optical computing? ¶
Q: Are lasers distinguished from other light sources by their coherence? ¶
Q: Are lasers extremely common in optical research and educational laboratories? ¶
Q: Is a laser normally a material of controlled purity? ¶
A: Yes, and size, concentration, and shape, which amplifies the beam by the process of stimulated emission described above.
Q: Were lasers invented in 1960, they were called "a solution looking for a problem"? ¶
A: Yes, Since then, they have become ubiquitous, finding utility in thousands of highly varied applications in every section of modern society, including consumer electronics, information technology, science, medicine, industry, law enforcement, entertainment, and the military.
Q: Are lasers used in optical disk drives, laser printers, and barcode scanners? ¶
A: Yes, DNA sequencing instruments, fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment.
Q: Are lasers pulsed simply because they cannot be run in continuous mode? ¶
Q: Was a laser recognized as being potentially dangerous? ¶
Q: Is a laser designed as a double-clad fiber? ¶
Q: Are lasers employed in applications where light of the required spatial or temporal coherence could not be produced using simpler technologies? ¶
Q: Is a laser many orders of magnitude greater than its average power? ¶
Q: Are lasers a key technology in modern communications? ¶
A: Yes, and allowing services such as the Internet.